N/a 1uz

[Nacho_SC400T]

Well I have my 1g sc that is lacking power and from my research on this site everything points to the intake and exhaust and ecu being stupidly ristrictive on this car so I have some of it figured out but I'm pretty much stuck when it comes to the heads and tuning Im aiming for 300+350hp, so far I'm planning on doing the following mods;

BFI
Upgrading the intake piping
EGR delete
port match the intake manifold, heads and headers
2.5" single exhaust

I want to go with cams too but thats were im pretty much clueless and is there anything else to make my goal more acheviable?

And what can i use to tune it? Im trying to steer away from a full standalone?

Any help will be greatly appreciated guys thanks!

 

[RotaSpinna]

No REAL need to port match anything.

BFI
Headers
2.5" Exhaust(make sure it is an x-pipe or y-pipe design)

Cams will probably be from Kelford or Lextreme. Just make sure you check the valve to cam clearance and adjust accordingly.

I was interested in a MAP-ECU piggyback. That way you can remove the MAF sensor and adjust fuel curve.

My .02

 

[Nacho_SC400T]

Cool bro but my reason for port matching was more of an extra measure to get as much flow as I can you know and with cams would I be able to get away with just upgrading the springs or would I need a completely new valvetrain?


And for tuning your talking about something like an Apexi SAFC right?

 

[JBrady]

Well I have my 1g sc that is lacking power and from my research on this site everything points to the intake and exhaust and ecu being stupidly ristrictive on this car so I have some of it figured out but I'm pretty much stuck when it comes to the heads and tuning Im aiming for 300+350hp, so far I'm planning on doing the following mods;

BFI
Upgrading the intake piping
EGR delete
port match the intake manifold, heads and headers
2.5" single exhaust

I want to go with cams too but thats were im pretty much clueless and is there anything else to make my goal more acheviable?

And what can i use to tune it? Im trying to steer away from a full standalone?

Any help will be greatly appreciated guys thanks!

Are your goals engine power or "dynojet" (rwhp) power?

Member RMS built an optimized (for his goal) individual throttle body intake manifold and long tube tuned headers. On an otherwise completely stock Tokyo taxi cab 1UZ (first gen) measured 306hp @ 6500rpm and 270tq @ 5000rpm. These are engine power figures. IF you achieved the same, the rwhp through the stock transmission will likely be in the 240-250rwhp range.

If engine power is your goal... 300hp is definitely achievable but 350hp will get fairly expensive and you will still struggle to get over say 270tq. Alternately you could turbo/supercharge the engine and target 325rwhp (close to 400hp engine) and similar torque on the stock intake manifold and even exhaust manifolds running LOW boost (ie 8psi or so).

From a drivability standpoint the higher torque at lower RPM will make for a much stronger performer in virtually all conditions.

The tuning section on this site should help you decide what to use with the amount of money you can spend.

 

[Nacho_SC400T]

If by dynojet you mean dyno queen then no I'm just looking for enough power to keep up with 350z's and 4.6 mustangs you know. And ITBs arent really in my buget I just want a way to bring my car up to speed without breaking the bank.

 

[XR8tt]

Cam, valve springs springs. Then follow what cam manu suggest..
To get things moving ??Check the final drive ratio ??
A few more RPM gives better torque ratio which would make it accelerate [hopefully] quicker especially if auto...
4 speed LS400 have 3.61
4 speed SC400 have 3.92
The 5 speeds have 3.26 final drives..
I don't know if they are a direct swap ??

 

[Nacho_SC400T]

Awsome, I was planning on getting a tc from lextreme and maybe an aftermarket tcu. But lastly tuning, I searched through the tuning section but only found info on standalones which I'm trying to avoid.
Is there a piggyback that will work with our engines?

 

[XR8tt]

Do you know a tuner in your area ??
Talk to them about options..
As he will specialise in what brand ECU
he sells and deals with..

Quite often the std ECU is left to control
other functions such as cruise control, idle control etc..

 

[Nacho_SC400T]

Yes he pointed me in the direction of an Apexi safc and emanage but I'm looking for something thatll also control timing.

 

[gloverman]

http://www.mapecu.com/

never used one but should do the job you want.

Or use a full standalone - I use link ECU

http://www.linkecu.com/

And wire it as a piggyback.

Cheers

 

[XR8tt]

I'm in the other side of the world here..
How far are you away from these guys ??
http://www.grs-motorsports.com/index/index.html

They have some fregan crazzzy cars!!!

 

[Nacho_SC400T]

Pretty far I'm up in Delaware USA

 

[XR8tt]

Change ..
Join Date: Jan 2012
Location: Puerto rico
Posts: 22

 

[SlowMoe]

It seems like I read somewhere that the lower intake manifold and upper intake ports have some bends that are seriously restrictive...Has anyone ever tried to port these areas to improve flow? Even 20 whp vs the 50 that ITB's offer would be worth the trouble, eh?

 

[Nacho_SC400T]

Change ..
Join Date: Jan 2012
Location: Puerto rico
Posts: 22

taken care of...

It seems like I read somewhere that the lower intake manifold and upper intake ports have some bends that are seriously restrictive...Has anyone ever tried to port these areas to improve flow? Even 20 whp vs the 50 that ITB's offer would be worth the trouble, eh?

That's exactly what I was planning to do along with honing both upper and lower, good there possibly be some kind of gain here?

 

[RotaSpinna]

Cool bro but my reason for port matching was more of an extra measure to get as much flow as I can you know and with cams would I be able to get away with just upgrading the springs or would I need a completely new valvetrain?


And for tuning your talking about something like an Apexi SAFC right?

Not worth it. If you haven't done any porting yourself, don't do it. If you don't have the money to pay someone to do it, don't do it yourself haha. Remember that if you over port or mess up, there are no re-dos. The intake side of the heads are fine for NA power. It is the manifold that sucks.

Tune-up with wires, timing belt with waterpump, intake, cams, valvesprings, headers, exhaust with x-pipe.

Cheesy piggy-backs like the SAFC and E-Manage will NOT help. They only "trick" the factory ECU. Go with a MAP-ECU or E-Manage Ultimate to be able to fine tune fuel curve and remove the restrictive MAF sensor in the intake. OR do some more searching on the AEM or Haltech Standalone ECUs.

Either way, 300 ENGINE hp is about all you'll get

 

[Nacho_SC400T]

Not worth it. If you haven't done any porting yourself, don't do it. If you don't have the money to pay someone to do it, don't do it yourself haha. Remember that if you over port or mess up, there are no re-dos. The intake side of the heads are fine for NA power. It is the manifold that sucks.

Tune-up with wires, timing belt with waterpump, intake, cams, valvesprings, headers, exhaust with x-pipe.
Cheesy piggy-backs like the SAFC and E-Manage will NOT help. They only "trick" the factory ECU. Go with a MAP-ECU or E-Manage Ultimate to be able to fine tune fuel curve and remove the restrictive MAF sensor in the intake. OR do some more searching on the AEM or Haltech Standalone ECUs.

Either way, 300 ENGINE hp is about all you'll get

No I haven't done any actual porting myself but a spare set of heads and a weekend off seems worth it but it can't be much different then a small engine and if I mess up oh well they were spare heads and I got some experience out of it.

And yea I know the manifold sucks haha I was going to hone it to see kit I can get better flow.

So piggybacks are out so emanage ultimate is my only choice here and 300bhp is all I'm going for the rest will be getting some slack out of the drivetrain.

Btw for the exhaust should I go with 2.25 or 2.5 inch piping, x or y pipe?